CN106396160B - Water purification system and control method thereof - Google Patents

Water purification system and control method thereof Download PDF

Info

Publication number
CN106396160B
CN106396160B CN201611061546.3A CN201611061546A CN106396160B CN 106396160 B CN106396160 B CN 106396160B CN 201611061546 A CN201611061546 A CN 201611061546A CN 106396160 B CN106396160 B CN 106396160B
Authority
CN
China
Prior art keywords
water
electromagnetic valve
concentrated water
branch
concentrated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201611061546.3A
Other languages
Chinese (zh)
Other versions
CN106396160A (en
Inventor
张细燕
胡进华
李一然
秦利利
许�鹏
周栋
周平发
林治权
杨勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201611061546.3A priority Critical patent/CN106396160B/en
Publication of CN106396160A publication Critical patent/CN106396160A/en
Application granted granted Critical
Publication of CN106396160B publication Critical patent/CN106396160B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination
    • Y02A20/131—Reverse-osmosis

Abstract

The invention provides a water purification system, which comprises a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch, a second branch and a wastewater ratio component; the water outlet end of the first branch is connected with the water inlet pipeline, and a first electromagnetic valve is arranged on the first branch; the water outlet end of the second branch is connected with the water outlet section of the concentrated water pipeline or is directly emptied, and the second branch is provided with a second electromagnetic valve; the water inlet end of the first branch and the water inlet end of the second branch are connected to a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve through a wastewater ratio assembly. Through the intermittent switch of the first electromagnetic valve on the second branch and the second electromagnetic valve on the second branch, the intermittent backflow of the concentrated water is realized, the discharge of the concentrated water is reduced, the recovery rate of the water purifying system is improved, and meanwhile, the pressure of the reverse osmosis membrane can be greatly reduced due to the intermittent and adjustable backflow of the concentrated water, and the service life of the reverse osmosis membrane is prevented from being shortened.

Description

Water purification system and control method thereof
Technical Field
The invention relates to the technical field of water quality purification, in particular to a water purification system and a control method thereof.
Background
The traditional water purifying system has the defects of low recovery rate and large concentrated water discharge. In order to realize the water saving effect of the water purifying system, oneThe water purification system with high recovery rate adopts the process of reducing the discharge of the concentrated water or refluxing the concentrated water to improve the recovery rate, and the two water treatment processes improve the recovery rate to a certain extent so as to achieve the aim of saving water, but directly reduce the discharge of the concentrated water or the whole reflux of the concentrated water, the surface of the reverse osmosis membrane can generate serious concentration polarization, if the CaCO on the surface of the reverse osmosis membrane cannot be disturbed in time 3 The formation of small crystal nucleus can form scale on the surface of the reverse osmosis membrane, so that the pollution speed is relatively accelerated, the performance attenuation of the reverse osmosis membrane is accelerated, the service life is shortened sharply, and the reverse osmosis membrane is unreasonably used.
Disclosure of Invention
Based on the above, it is necessary to provide a water purification system and a control method thereof, aiming at the problem of unreasonable use of a reverse osmosis membrane of a traditional water purification system.
The invention provides a water purification system, which comprises a pretreatment unit and a reverse osmosis membrane treatment unit, wherein the pretreatment unit and the reverse osmosis membrane treatment unit are respectively connected with two ends of a water inlet pipeline, a concentrated water outlet of the reverse osmosis membrane treatment unit is connected with a concentrated water pipeline, and a concentrated water discharge electromagnetic valve is arranged on the concentrated water pipeline; the water purification system also comprises a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch, a second branch and a wastewater ratio component;
the water outlet end of the first branch is connected with the water inlet pipeline, and a first electromagnetic valve is arranged on the first branch;
the water outlet end of the second branch is connected with the water outlet section of the concentrated water pipeline or is directly emptied, and the second branch is provided with a second electromagnetic valve;
the water inlet end of the first branch and the water inlet end of the second branch are connected to a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve through a wastewater ratio assembly.
In one embodiment, the concentrated water discharge control unit further comprises a third branch, the water inlet end of the third branch is connected with a concentrated water pipeline between the concentrated water outlet of the reverse osmosis membrane treatment unit and the concentrated water discharge electromagnetic valve, the water outlet end of the third branch is connected with the water outlet section of the concentrated water pipeline or is directly emptied, and a third wastewater ratio is arranged on the third branch.
In one embodiment, the wastewater ratio assembly comprises a first wastewater ratio, wherein the water inlet end of the first branch and the water inlet end of the second branch are connected with the water outlet end of the first wastewater ratio, and the water inlet end of the first wastewater ratio is connected with a concentrated water pipeline between the concentrated water outlet of the reverse osmosis membrane treatment unit and the concentrated water discharge electromagnetic valve.
In one embodiment, the wastewater ratio assembly includes a first wastewater ratio and a second wastewater ratio;
the water inlet end of the first branch is connected with the water inlet end of the first wastewater ratio, and the water inlet end of the first wastewater ratio is connected with a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve;
the water inlet end of the second branch is connected with the water outlet end of the second wastewater ratio, and the water inlet end of the second wastewater ratio is connected with a concentrated water pipeline between a concentrated water outlet of the reverse osmosis membrane treatment unit and a concentrated water discharge electromagnetic valve.
In one embodiment, a pressure stabilizing pump is further arranged on a water inlet pipeline between the pretreatment unit and the reverse osmosis membrane treatment unit, and a connection point between the water outlet end of the first branch and the water inlet pipeline is arranged between the pretreatment unit and the pressure stabilizing pump.
In one embodiment, the water purification system further comprises a control center, wherein the control center is in signal connection with the concentrated water discharge solenoid valve, the first waste water ratio, the second solenoid valve and the second waste water ratio.
The invention also provides a control method of the water purification system, which comprises the following steps:
s100: when the water purification system is electrified, the concentrated water discharge electromagnetic valve is controlled to be opened for a seconds and then closed, and the water purification system enters a water production mode;
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a first operation mode;
the first operation mode comprises the steps of controlling the second electromagnetic valve to be opened for b seconds and then closed;
the second operation mode comprises the steps of controlling the first electromagnetic valve to be opened for c seconds and then closed;
wherein a > 0, b > 0, c > 0.
In one embodiment thereof, the control method further comprises the steps of:
s300: after the water purification system continuously prepares water for d hours, the first electromagnetic valve and the second electromagnetic valve are controlled to be closed, and the concentrated water discharge electromagnetic valve is controlled to be opened for e seconds and then closed;
wherein d > 0 and e > 0.
In one embodiment thereof, the control method further comprises the steps of:
s400: when the pressure value of the pressure barrel is larger than a first preset pressure value, the first electromagnetic valve and the second electromagnetic valve are controlled to be closed, and the concentrated water discharge electromagnetic valve is controlled to be closed after being opened for f seconds;
wherein f > 0.
In one embodiment thereof, the control method further comprises the steps of:
s400': when the pressure value of the pressure barrel is smaller than a second preset pressure value, the first electromagnetic valve and the second electromagnetic valve are controlled to be closed, and the concentrated water discharge electromagnetic valve is controlled to be closed after being opened for g seconds;
wherein g is more than or equal to 0.
In one embodiment, the size of a, b, c, d, e, f, g is adjusted according to the raw water quality parameter.
In one embodiment, the raw water quality parameter is TDS or turbidity value.
In one embodiment, the raw water quality parameter adjustment is adjusted by the following method;
when TDS < Xppm, the first operation mode includes controlling the second solenoid valve to open b 1 After a second, the second operation mode comprises controlling the first electromagnetic valve to be opened c 1 Closing after seconds;
when Xppm is less than or equal to TDS less than Yppm, the first operation mode comprises controlling the second electromagnetic valve to open b 2 After a second, the second operation mode comprises controlling the first electromagnetic valve to be opened c 2 Closing after seconds;
when TDS is not less than Yppm, the first operation mode comprises controlling the second electromagnetic valve to open b 3 After a second, the second operation mode comprises controlling the first electromagnetic valve to be opened c 3 Closing after seconds;
wherein X is more than 0 and less than Y, and b is more than 0 and less than b 1 ＜b 2 ＜b 3 ，0＜c 3 ＜c 2 ＜c 1 。
The water purification system and the control method thereof, wherein the water purification system also comprises a concentrated water discharge control unit, and the concentrated water discharge control unit comprises a first branch and a second branch; the first branch road can flow back the dense water in the dense water pipeline to the inlet tube in, and the second branch road can discharge the dense water in the dense water pipeline, through the intermittent switch of first solenoid valve on the control second branch road and second solenoid valve on the second branch road, realizes the intermittent type formula backward flow of dense water, reduces dense water and discharges, improves water purification system's rate of recovery, simultaneously owing to be intermittent type end, but the thick water backward flow of regulation and control ground, but greatly reduced reverse osmosis membrane's pressure, avoid its life to shorten. The proportion of pure water to concentrated water in the traditional water purification system is generally 1:3, the water purification system and the control method thereof can realize that the proportion of pure water to concentrated water reaches 2:1, simultaneously, the service life of the reverse osmosis membrane is prolonged from 8-12 months to 20-24 months.
According to the water purification system and the control method thereof, the flushing of the water purification system is realized by opening the intermittent concentrated water discharge electromagnetic valve, and CaCO (CaCO) is disturbed 3 And small crystal nucleus is formed, so that the scale formation on the surface of the reverse osmosis membrane is slowed down, and the service life of the reverse osmosis membrane is prolonged.
The water purification system and the control method adopt the combination of intermittent concentrated water backflow and intermittent flushing, so that the water quantity entering the reverse osmosis membrane is increased, the reverse osmosis membrane is flushed in time, the discharge of concentrated water can be reduced, the concentration polarization of the reverse osmosis membrane can be slowed down, and the service life of the reverse osmosis membrane is prolonged; meanwhile, the intermittent concentrated water reflux and intermittent flushing can realize relatively stable front pressure of the reverse osmosis membrane, and can effectively protect the usability of the reverse osmosis membrane.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
Fig. 1 is a front view of a water purification system according to an embodiment of the present invention;
FIG. 2 is a front view of a second embodiment of the water purification system of the present invention;
FIG. 3 is a front view of a third embodiment of the water purification system of the present invention;
wherein, the liquid crystal display device comprises a liquid crystal display device,
111-a water inlet pipeline; 112-a concentrated water pipeline; 113-a pure water pipeline; 114-high pressure water pipe;
121-a pressure reducing valve; 122-a water quality detection element; 123-low voltage switch; 124-a water inlet solenoid valve; 125-a concentrate discharge solenoid valve; 126-pressure stabilizing pump; 127-check valve; 128-high voltage switch; 129-pressure barrels;
210-a first stage cartridge; 220-a second stage cartridge;
300-a reverse osmosis membrane treatment unit;
410-a first branch; 411-first wastewater ratio; 412-a first solenoid valve;
420-a second leg; 421-second wastewater ratio; 422-a second solenoid valve;
430-a third leg; 431-third waste water ratio;
500-a post-processing unit;
600-tap.
Detailed Description
In order to make the technical scheme of the invention clearer, the invention is further described in detail below with reference to the attached drawings and specific embodiments.
Referring to fig. 1, a water purification system according to a first embodiment of the present invention includes a pretreatment unit, a reverse osmosis membrane treatment unit 300, a concentrate discharge control unit, a post-treatment unit 500, a pressure tank 129, a faucet 600, and a control center (not shown).
Wherein the pretreatment unit, the reverse osmosis membrane treatment unit 300 and the post-treatment unit 500 are sequentially connected in series; the pure water outlet of the reverse osmosis membrane treatment unit 300 is connected to the pressure tank 129 through the high-pressure water pipe 114 on the one hand, and is connected to the post-treatment unit 500 through a pipe, the post-treatment unit 500 is connected to the faucet 600 through the pure water pipe 113, the pure water pipe 113 is provided with a check valve 127 to prevent the pure water from flowing back, and the concentrated water outlet of the reverse osmosis membrane treatment unit 300 is connected to the concentrated water pipe 112.
Wherein, the raw water pipeline of the raw water entering the pretreatment unit is provided with a pressure reducing valve 121, the water inlet pipeline 111 between the pretreatment unit and the reverse osmosis membrane treatment unit 300 is sequentially provided with a water quality detection element 122, a low-pressure switch 123, a water inlet electromagnetic valve 124 and a pressure stabilizing pump 126, the high-pressure pipeline 114 is provided with a high-pressure switch 128, and the concentrated water pipeline 112 is provided with a concentrated water discharge electromagnetic valve 125.
Wherein, the concentrated water discharge control unit includes a first branch 410, a second branch 420, and a water purification ratio assembly.
The water inlet end of the first branch 410 is connected to the water outlet end of the water purification ratio assembly, the water outlet end of the first branch 410 is connected to the water inlet pipe 111, preferably to the water inlet pipe 111 between the water inlet solenoid valve 124 and the regulated pump 126, and the first branch 410 is further provided with a first solenoid valve 412.
The water inlet end of the second branch 420 is connected to the water outlet end of the water purification ratio assembly, the water outlet section of the second branch 420 is connected to the water outlet section of the concentrated water pipeline 112 or is directly emptied, and the second branch 420 is provided with a second electromagnetic valve 422.
The water inlet end of the wastewater ratio module is connected to the concentrated water pipe 112 between the concentrated water outlet of the reverse osmosis membrane treatment unit 300 and the concentrated water discharge solenoid valve 125, and the wastewater ratio module in this embodiment includes a first wastewater ratio 411.
The control center is used for controlling the water purification system to work according to a preset mode, and is in signal connection with the pressure reducing valve 121, the water quality detecting element 122, the low-pressure switch 123, the water inlet electromagnetic valve 124, the concentrate discharging electromagnetic valve 125, the stabilized pump 126, the high-pressure switch 128, the first electromagnetic valve 412 and the second electromagnetic valve 422. Signal connections include, but are not limited to, electrical connections, wireless connections, wired connections.
The pretreatment unit comprises a first-stage filter element 210 and a second-stage filter element 220, wherein the first-stage filter element 210 is activated carbon, and the second-stage filter element 220 is an ultrafiltration membrane.
As another embodiment, the pretreatment unit includes a first stage filter 210 and a second stage filter 220, wherein the first stage filter 210 is an ultrafiltration membrane and the second stage filter 220 is activated carbon. The first stage filter element 210 can retain most of the impurity substances in the raw water, can protect the other filter elements at all stages, and prolongs the service life of the filter elements.
As an embodiment, the pretreatment unit includes a first stage filter 210, a second stage filter 220, and a third stage filter, and the filter of the first stage filter 210, the second stage filter 220, and the third stage filter may be selected from any one of an activated carbon filter, a carbon rod filter, and a PP cotton filter.
As an embodiment, the post-treatment unit 500 may be a PP cotton filter cartridge, a composite filter cartridge, which functions to further treat pure water stored in the pressure tank 129 or pure water delivered by the reverse osmosis membrane unit to remove bacteria and bad smell.
The water quality detecting element 122 is a total dissolved solids (Total dissolved solids, TDS) detecting element. TDS indicates the content of soluble solids dissolved in water, and higher TDS indicates more impurities contained in water.
As one implementation, the water quality detection element 122 is a conductivity test element.
As an embodiment, the water purification system further comprises a second water purification pipe, wherein the water inlet end of the second water purification pipe is connected to the water inlet pipe 111 between the water inlet solenoid valve 124 and the first branch 410. The water outlet of the second water purifying pipeline is connected to the tap 600, and raw water enters the tap 600 for a user after being processed by the pretreatment unit.
Referring to fig. 1, raw water enters a water purification system through a raw water inlet, is first treated through a first stage filter 210 and a second stage filter 220 of a pretreatment unit, and enters a reverse osmosis membrane treatment unit 300 through a water inlet pipe 111, wherein a water quality detection element 122 of the water inlet pipe 111 detects water quality data flowing therethrough and transmits the water quality data to a control center. The water entering the reverse osmosis membrane treatment unit 300 is treated into pure water and concentrated water. Pure water, or after being processed by the post-processing unit 500, enters the faucet 600 through the pure water pipeline 113 for a user to use; or through the high-pressure water pipe 114 into the pressure tank 129, wherein the high-pressure switch 128 on the high-pressure water pipe 114 is used for detecting the water pressure condition of the high-pressure water pipe 114 and transmitting the detected water pressure condition to the control center. The concentrated water is discharged from the water purification system through the concentrated water pipeline 112, or is intermittently returned to the water inlet pipeline 111 through the first branch 410, or is intermittently discharged from the water purification system through the second branch 420.
Correspondingly, the control method of the water purification system provided by the invention comprises the following steps:
s100: when the water purification system is powered on, the concentrated water discharge electromagnetic valve 125 is controlled to be opened for a seconds and then closed, and the water purification system enters a water making mode;
specifically, when the water purification system is powered on, the control center controls the water inlet electromagnetic valve 124 and the concentrated water discharge electromagnetic valve 125 to be opened, raw water sequentially enters the reverse osmosis membrane treatment unit 300 through the pressure reducing valve 121, the first-stage filter element 210, the second-stage filter element 220 and the pressure stabilizing pump 126, concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 is discharged out of the system through the concentrated water pipeline 112, after a seconds, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purification system enters a water preparation mode.
S200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
wherein, the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then closed;
specifically, the control center controls the second solenoid valve 422 to be opened to enter the first operation mode, and the concentrate discharged from the concentrate outlet of the reverse osmosis membrane treatment unit 300 sequentially flows through the first waste water ratio 411 of the first branch 410 and the second branch 420 to be discharged out of the system. At this time, since the concentrated water needs to pass through the first wastewater ratio 411, there is a certain pressure difference between the inside and the outside of the reverse osmosis membrane, and the reverse osmosis membrane treatment unit 300 can prepare a certain amount of pure water. The amount of pure water produced is related to the first waste water ratio 411, preferably the first waste water ratio 411 is 150-600cc.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the second operation mode is entered, the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410 to enter the water inlet pipeline 111, and the concentrated water enters the reverse osmosis membrane treatment unit 300 again for treatment.
After c seconds, the first solenoid valve 412 is controlled to close and the second solenoid valve 422 is controlled to open, entering the first mode of operation.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first operation mode, raw water is treated and then is divided into pure water and concentrated water, the pure water is used by a user, the concentrated water is discharged, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411.
When the water purification system is in the second operation mode, the raw water is divided into pure water and concentrated water after being treated, the pure water is used by a user, the concentrated water flows back to the water inlet pipeline 111 and is treated and utilized again, and the recovery rate is improved.
The water purification system circulates between the first operation mode and the second operation mode when producing water, and intermittently returns concentrated water, so that the discharge of the concentrated water is reduced, concentration polarization on the surface of the reverse osmosis membrane, which is easily caused by continuous back flow, is avoided, and the service life of the reverse osmosis membrane is prolonged.
It should be noted that a > 0, b > 0, and c > 0.
As an implementation manner, when the water purification system prepares water, the concentrated water discharge electromagnetic valve 125 is controlled to be opened, so that the concentrated water pipeline 112 can discharge concentrated water with a certain flow rate, the discharge flow rate of the concentrated water is increased, the polarization of the concentrated tea of the reverse osmosis membrane is reduced, and the attenuation of the reverse osmosis membrane is slowed down.
At this time, when the water purification system is in the first operation mode, raw water is treated and then separated into pure water and concentrated water, the pure water is supplied to a user, the concentrated water is discharged, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411.
When the water purification system is in the second operation mode, raw water is divided into pure water and concentrated water after being treated, the pure water is used by a user, and a part of concentrated water flows back to the water inlet pipeline 111 and is treated and utilized again, so that the recovery rate is improved; another portion of the concentrate is discharged and the ratio of pure water to concentrate is determined by the first wastewater ratio 411 and the flow rate of the concentrate discharge solenoid valve 125.
As an embodiment, the control method further includes the steps of:
s300: after the water purification system continuously prepares water for d hours, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrated water discharge electromagnetic valve 125 is controlled to be opened for e seconds and then closed;
specifically, after the water purification system continuously produces water for d hours, the control center controls the first electromagnetic valve 412 and the second electromagnetic valve 422 to be closed, so that the water purification system exits from the water production mode; the concentrated water discharge electromagnetic valve 125 is controlled to be opened, the water purifying system enters a flushing mode, the concentrated water is completely discharged out of the system through the concentrated water pipeline 112, and after e seconds, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purifying system reenters a water making mode or is closed.
After continuous water production for a period of time, the surface of the reverse osmosis membrane can generate certain concentration polarization, and certain CaCO3 crystal nuclei also exist, and through intermittently-continuously water production for a certain period of time, the concentrated water is completely discharged out of the system through the concentrated water pipeline 112, so that the concentration polarization can be eliminated in time, the CaCO3 crystal nuclei on the surface of the reverse osmosis membrane are washed away, the scale formation on the surface of the reverse osmosis membrane is avoided, and the attenuation of the reverse osmosis membrane is delayed.
D > 0 and e > 0.
As an embodiment, the control method further includes the steps of:
s400: when the pressure value of the pressure tank 129 is greater than the first preset pressure value, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrate discharge electromagnetic valve 125 is controlled to be opened for f seconds and then closed;
specifically, the high-pressure switch 128 is disposed on the high-pressure water pipe 114, and is capable of detecting a pressure value of the high-pressure water pipe 114, and since the high-pressure water pipe 114 is communicated with the pressure tank 129, the pressure value of the high-pressure water pipe 114 is a pressure value of the reaction pressure tank 129.
The high-pressure switch 128 transmits the detected pressure value to the control center, and when the control center judges that the detected pressure value is larger than a first preset pressure value, the control center controls the first electromagnetic valve 412 and the second electromagnetic valve 422 to be closed, controls the concentrated water discharge electromagnetic valve 125 to be opened, controls the water purification system to enter a flushing mode, and controls the concentrated water discharge electromagnetic valve 125 to be closed after the concentrated water is completely discharged out of the system through the concentrated water pipeline 112 for f seconds, so that the water purification system reenters a water preparation mode or is closed.
F > 0.
Preferably, the first preset pressure value is less than or equal to the pressure value at which the pressure vessel 129 is full of water.
As an embodiment, the control method further includes the steps of:
s400': when the pressure value of the pressure tank 129 is smaller than the second preset pressure value, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, and the concentrated water discharge electromagnetic valve 125 is controlled to be closed after being opened for g seconds;
specifically, the high-voltage switch 128 transmits the detected pressure value to the control main board control center, when the control center determines that the detected pressure value is smaller than the second preset pressure value, for example, after the water in the pressure barrel 129 is used by a user through the unit and the faucet 600, the water quantity in the pressure barrel 129 is reduced, the pressure is reduced, the first electromagnetic valve 412 and the second electromagnetic valve 422 are controlled to be closed, the concentrated water discharge electromagnetic valve 125 is controlled to be opened, the water purification system enters a flushing mode, the concentrated water is discharged from the system through the concentrated water pipeline 112, g seconds later, the concentrated water discharge electromagnetic valve 125 is controlled to be closed, and the water purification system reenters a water preparation mode.
It is noted that g is not less than 0; i.e. g may be zero, i.e. no flushing may be performed when it is detected that the pressure value of the pressure vessel 129 is smaller than the second preset pressure value.
Preferably, the second preset pressure value is less than or equal to the pressure tank 129 less than the first preset pressure value.
As an alternative embodiment, the size of a, b, c, d, e, f, g is adjusted according to the raw water quality parameter. For example: when TDS < 200ppm, a=30, b=10, c=110, d= 8,e =30, f=30, g=10; when 200ppm < TDS < 500ppm, a=30, b=15, c=105, d= 8,e =30, f=30, g=10; when TDS > 500ppm, a=30, b3=20, c=100, d= 8,e =30, f=30, g=10 are set.
Preferably, the raw water quality parameter is TDS or turbidity value. The raw water quality parameter is measured by a water quality detecting element and transmitted to a control center.
As an alternative embodiment, when the raw water quality parameter is TDS, the method for adjusting the raw water quality parameter is as follows:
when TDS < Xppm, the first mode of operation includes controlling the second solenoid valve 422 to open b 1 After a second, the second mode of operation includes controlling the first solenoid valve 412 to open c 1 Closing after seconds;
when Xppm is less than or equal to TDS < Y ppm, the first mode of operation includes controlling the second solenoid valve 422 to open b 2 After a second, the second mode of operation includes controlling the first solenoid valve 412 to open c 2 Closing after seconds;
when TDS is greater than or equal to Y ppm, the first mode of operation includes controlling the second solenoid 422 to open b 3 After a second, the second mode of operation includes controlling the first solenoid valve 412 to open c 3 Closing after seconds;
wherein X is more than 0 and less than Y, and b is more than 0 and less than b 1 ＜b 2 ＜b 3 ，0＜c 3 ＜c 2 ＜c 1 。
For example, the water purification system is preset with x=200 ppm, y=500 ppm, b1=10, b2=15, b3=20, c1=110, c2=105, c3=100 s, namely
When TDS < 200ppm, the first mode of operation includes controlling the second solenoid valve 422 to open for 10 seconds and then close, and the second mode of operation includes controlling the first solenoid valve 412 to open for 110 seconds and then close;
when 200ppm is less than or equal to TDS < 500ppm, the first operation mode comprises controlling the second electromagnetic valve 422 to be opened for 15 seconds and then closed, and the second operation mode comprises controlling the first electromagnetic valve 412 to be opened for 105 seconds and then closed;
when TDS is greater than or equal to 500ppm, the first mode of operation includes controlling the second solenoid valve 422 to open for 20 seconds and then to close, and the second mode of operation includes controlling the first solenoid valve 412 to open for 100 seconds and then to close.
That is, as the TDS increases, the time to drain the concentrate through the second branch 420 increases, and the time to recover the concentrate through the first branch 410 decreases.
Example two
Referring to fig. 2, the difference between the second embodiment and the first embodiment of the present invention is that the concentrated water discharge control unit further includes a third branch 430, the water inlet end of the third branch 430 is connected to the concentrated water pipe 112 between the concentrated water outlet of the reverse osmosis membrane treatment unit 300 and the concentrated water discharge solenoid valve 125, the water outlet end of the third branch 430 is connected to the water outlet section of the concentrated water pipe 112 or is directly emptied, and a third wastewater ratio 431 is provided on the third branch 430.
Correspondingly, the control method of the water purifying system provided by the invention is different from the first embodiment in that:
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
wherein, the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then closed;
specifically, the control center controls the second electromagnetic valve 422 to open, and enters the first operation mode, a part of the concentrate discharged from the concentrate outlet of the reverse osmosis membrane treatment unit 300 flows through the first wastewater ratio 411 of the first branch 410 and the second branch 420 in sequence to be discharged out of the system, and another part of the concentrate flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system. In this case, since the concentrated water is required to pass through the first wastewater ratio 411 and the third wastewater ratio 431, the reverse osmosis membrane treatment unit 300 can produce a certain amount of pure water with a certain pressure difference between the inside and outside of the reverse osmosis membrane. The amount of pure water produced is related to the first waste water ratio 411 and the third waste water ratio 431, and preferably, the first waste water ratio 411 is 150 to 600cc and the third waste water ratio 431 is 100 to 200cc.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the second operation mode is started, a part of concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410 to enter the water inlet pipeline 111, enters the reverse osmosis membrane treatment unit 300 again to be treated, and the other part of concentrated water flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system.
After c seconds, the first solenoid valve 412 is controlled to close and the second solenoid valve 422 is controlled to open, entering the first mode of operation.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first operation mode, raw water is treated and then is divided into pure water and concentrated water, the pure water is used by a user, the concentrated water is discharged, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
When the water purification system is in the second operation mode, raw water is divided into pure water and concentrated water after being treated, the pure water is used by a user, one part of concentrated water flows back to the water inlet pipeline 111 and is treated and utilized again, the recovery rate is improved, the other part of concentrated water is discharged out of the system through the third branch 430, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
In this embodiment, the third waste water ratio 431 of the third leg 430 is a normally open waste water ratio to increase the amount of waste water exiting the system, reduce concentration polarization of the reverse osmosis membrane, and slow down the decay of the reverse osmosis membrane.
Example III
Referring to fig. 3, the third embodiment of the present invention is different from the second embodiment in that the wastewater ratio assembly of the concentrated water discharge control unit further includes a second wastewater ratio 421.
The water inlet end of the first branch 410 is connected to the water outlet end of the first wastewater ratio 411, and the water inlet end of the first wastewater ratio 411 is connected to the concentrate pipeline 112 between the concentrate outlet of the reverse osmosis membrane treatment unit 300 and the concentrate discharge solenoid valve 125; the water inlet end of the second branch 420 is connected to the water outlet end of the second wastewater ratio 421, and the water inlet end of the second wastewater ratio 421 is connected to the concentrate pipe 112 between the concentrate outlet of the reverse osmosis membrane treatment unit 300 and the concentrate discharge solenoid valve 125. The wastewater ratio of the second wastewater ratio 421 and the second wastewater ratio 411 may be the same or different.
Correspondingly, the control method of the water purifying system provided by the invention is different from the first embodiment in that:
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
wherein, the first operation mode is to control the second electromagnetic valve 422 to be opened for b seconds and then closed, and the second operation mode is to control the first electromagnetic valve 412 to be opened for c seconds and then closed;
specifically, the control center controls the second electromagnetic valve 422 to open, and enters the first operation mode, a part of the concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 sequentially flows through the second wastewater ratio 421 of the second branch 420 to be discharged out of the system, and another part of the concentrated water flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system. At this time, since the concentrated water needs to pass through the second wastewater ratio 421 and the third wastewater ratio 431, a certain pressure difference is provided between the inside and the outside of the reverse osmosis membrane, and the reverse osmosis membrane treatment unit 300 can produce a certain amount of pure water. The amount of pure water produced is related to the first waste water ratio 411, the second waste water ratio 421 and the third waste water ratio 431.
After b seconds, the second electromagnetic valve 422 is controlled to be closed, the first electromagnetic valve 412 is controlled to be opened, the second operation mode is started, a part of concentrated water discharged from the concentrated water outlet of the reverse osmosis membrane treatment unit 300 flows through the first branch 410 to enter the water inlet pipeline 111, enters the reverse osmosis membrane treatment unit 300 again to be treated, and the other part of concentrated water flows through the third wastewater ratio 431 of the third branch 430 to be discharged out of the system.
After c seconds, the first solenoid valve 412 is controlled to close and the second solenoid valve 422 is controlled to open, entering the first mode of operation.
As above, the water purification system is cycled between the first mode of operation and the second mode of operation.
When the water purification system is in the first operation mode, raw water is divided into pure water and concentrated water after being treated, the pure water is used by a user, the concentrated water is discharged, and the proportion of the pure water to the concentrated water is determined by the second wastewater ratio 421 and the third wastewater ratio 431.
When the water purification system is in the second operation mode, raw water is divided into pure water and concentrated water after being treated, the pure water is used by a user, one part of concentrated water flows back to the water inlet pipeline 111 and is treated and utilized again, the recovery rate is improved, the other part of concentrated water is discharged out of the system through the third branch 430, and the ratio of the pure water to the concentrated water is determined by the first wastewater ratio 411 and the third wastewater ratio 431.
In this embodiment, the first branch 410 and the second branch 420 are respectively provided with a first wastewater ratio 411 and a second wastewater ratio 421, and since the wastewater ratios of the first branch 410 and the second branch 420 adopt different wastewater ratio devices, the sizes of the first wastewater ratio 411 and the second wastewater ratio 421 can be flexibly adjusted, and the flow of the intermittent recovery concentrated water can be more flexibly adjusted.
In the above description of the present invention, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (13)

1. The water purification system comprises a pretreatment unit and a reverse osmosis membrane treatment unit (300), wherein the pretreatment unit and the reverse osmosis membrane treatment unit (300) are respectively connected with two ends of a water inlet pipeline (111), a concentrated water outlet of the reverse osmosis membrane treatment unit (300) is connected with a concentrated water pipeline (112), and a concentrated water discharge electromagnetic valve (125) is arranged on the concentrated water pipeline (112); the water purification system is characterized by further comprising a concentrated water discharge control unit, wherein the concentrated water discharge control unit comprises a first branch (410), a second branch (420), a third branch (430) and a wastewater ratio component;
the water outlet end of the first branch (410) is connected to the water inlet pipeline (111), and a first electromagnetic valve (412) is arranged on the first branch (410);
the water outlet end of the second branch (420) is connected to the water outlet section of the concentrated water pipeline (112) or is directly emptied, and the second branch (420) is provided with a second electromagnetic valve (422); when the water purification system prepares water, the second electromagnetic valve (422) is closed after being opened for b seconds, the first electromagnetic valve (412) is controlled to be closed after being opened for c seconds, and the second electromagnetic valve (422) is controlled to be opened; the first solenoid valve (412) and the second solenoid valve (422) are operated cyclically, and b > 0, c > 0;
the water inlet end of the first branch (410) and the water inlet end of the second branch (420) are connected to a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125) through a wastewater ratio component;
the water inlet end of the third branch (430) is connected to a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125), the water outlet end of the third branch (430) is connected to a water outlet section of the concentrated water pipeline (112) or is directly emptied, a third wastewater ratio (431) is arranged on the third branch (430), and the third wastewater ratio (431) is a normally open wastewater ratio.
2. The water purification system of claim 1, wherein the wastewater ratio assembly comprises a first wastewater ratio (411), wherein the water inlet end of the first branch (410) and the water inlet end of the second branch (420) are connected to the water outlet end of the first wastewater ratio (411), and wherein the water inlet end of the first wastewater ratio (411) is connected to a concentrate line (112) between the concentrate outlet of the reverse osmosis membrane treatment unit (300) and the concentrate discharge solenoid valve (125).
3. The water purification system of claim 1, wherein the wastewater ratio assembly comprises a first wastewater ratio (411) and a second wastewater ratio (421);
the water inlet end of the first branch (410) is connected with the water outlet end of the first wastewater ratio (411), and the water inlet end of the first wastewater ratio (411) is connected with a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125);
the water inlet end of the second branch (420) is connected with the water outlet end of the second wastewater ratio (421), and the water inlet end of the second wastewater ratio (421) is connected with a concentrated water pipeline (112) between a concentrated water outlet of the reverse osmosis membrane treatment unit (300) and a concentrated water discharge electromagnetic valve (125).
4. The water purification system according to claim 1, wherein a pressure stabilizing pump (126) is further disposed on a water inlet pipe (111) between the pretreatment unit and the reverse osmosis membrane treatment unit (300), and a connection point between a water outlet end of the first branch (410) and the water inlet pipe (111) is disposed between the pretreatment unit and the pressure stabilizing pump (126).
5. A water purification system according to claim 3, further comprising a control center in signal connection with the concentrate discharge solenoid valve (125), the first solenoid valve (412), the first waste water ratio (411), the second solenoid valve (422), the second waste water ratio (421).
6. The water purification system according to claim 5, further comprising a pressure tank (129) and a post-treatment unit (500), wherein the pressure tank (129) is connected to the pure water outlet of the reverse osmosis membrane treatment unit (300) through both a high pressure water pipe (114) and the post-treatment unit (500) through pipes; the high-pressure water pipeline (114) is provided with a high-pressure switch (128), and the high-pressure switch is used for detecting the water pressure of the high-pressure water pipeline (114) and transmitting the detected water pressure condition to the control center.
7. A control method of the water purification system as claimed in any one of claims 1 to 6, comprising the steps of:
s100: when the water purification system is electrified, the concentrated water discharge electromagnetic valve (125) is controlled to be opened for a seconds and then closed, and the water purification system enters a water making mode;
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode comprises controlling a second electromagnetic valve (422) to open for b seconds, wherein a part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) flows through a second branch (420) to be discharged, and the other part of concentrated water flows through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
b seconds later, the second electromagnetic valve (422) is controlled to be closed, the first electromagnetic valve (412) is controlled to be opened, and the second operation mode is entered;
the second operation mode comprises the steps of controlling a first electromagnetic valve (412) to open for c seconds, enabling part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) to flow through a first branch (410) to enter a water inlet pipeline (111), enabling the concentrated water to enter the reverse osmosis membrane treatment unit (300) again for treatment, and enabling the other part of concentrated water to flow through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
c seconds later, controlling the first electromagnetic valve (412) to be closed, controlling the second electromagnetic valve (422) to be opened, and entering a first operation mode;
wherein a > 0, b > 0, c > 0.
8. The control method according to claim 7, characterized in that the control method further comprises the steps of:
s300: after the water purification system continuously prepares water for d hours, the first electromagnetic valve (412) and the second electromagnetic valve (422) are controlled to be closed, and the concentrated water discharge electromagnetic valve (125) is controlled to be opened for e seconds and then closed; wherein d > 0 and e > 0.
9. A control method of the water purification system as claimed in claim 6, wherein the control method comprises the steps of:
s100: when the water purification system is electrified, the concentrated water discharge electromagnetic valve (125) is controlled to be opened for a seconds and then closed, and the water purification system enters a water making mode;
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode comprises controlling a second electromagnetic valve (422) to open for b seconds, wherein a part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) flows through a second branch (420) to be discharged, and the other part of concentrated water flows through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
b seconds later, the second electromagnetic valve (422) is controlled to be closed, the first electromagnetic valve (412) is controlled to be opened, and the second operation mode is entered;
the second operation mode comprises the steps of controlling a first electromagnetic valve (412) to open for c seconds, enabling part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) to flow through a first branch (410) to enter a water inlet pipeline (111), enabling the concentrated water to enter the reverse osmosis membrane treatment unit (300) again for treatment, and enabling the other part of concentrated water to flow through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
c seconds later, controlling the first electromagnetic valve (412) to be closed, controlling the second electromagnetic valve (422) to be opened, and entering a first operation mode;
s400: when the pressure value of the pressure barrel (129) is larger than a first preset pressure value, the first electromagnetic valve (412) and the second electromagnetic valve (422) are controlled to be closed, and the concentrated water discharge electromagnetic valve (125) is controlled to be opened for f seconds and then closed;
wherein a > 0, b > 0, c > 0, f > 0.
10. A control method of the water purification system as claimed in claim 6, wherein the control method comprises the steps of:
s100: when the water purification system is electrified, the concentrated water discharge electromagnetic valve (125) is controlled to be opened for a seconds and then closed, and the water purification system enters a water making mode;
s200: when the water purification system prepares water, the concentrated water discharge control unit is controlled to circularly operate between a first operation mode and a second operation mode;
the first operation mode comprises controlling a second electromagnetic valve (422) to open for b seconds, wherein a part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) flows through a second branch (420) to be discharged, and the other part of concentrated water flows through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
b seconds later, the second electromagnetic valve (422) is controlled to be closed, the first electromagnetic valve (412) is controlled to be opened, and the second operation mode is entered;
the second operation mode comprises the steps of controlling a first electromagnetic valve (412) to open for c seconds, enabling part of concentrated water discharged from a concentrated water outlet of the reverse osmosis membrane treatment unit (300) to flow through a first branch (410) to enter a water inlet pipeline (111), enabling the concentrated water to enter the reverse osmosis membrane treatment unit (300) again for treatment, and enabling the other part of concentrated water to flow through a third wastewater ratio (431) of a third branch (430) to be discharged out of the system;
c seconds later, controlling the first electromagnetic valve (412) to be closed, controlling the second electromagnetic valve (422) to be opened, and entering a first operation mode;
s400': when the pressure value of the pressure barrel (129) is smaller than a second preset pressure value, the first electromagnetic valve (412) and the second electromagnetic valve (422) are controlled to be closed, and the concentrated water discharge electromagnetic valve (125) is controlled to be opened for g seconds and then closed;
wherein a is more than 0, b is more than 0, c is more than 0, and g is more than or equal to 0.
11. The control method according to claim 7, wherein the sizes of a, b and c are adjusted according to raw water quality parameters.
12. The control method according to claim 11, wherein the raw water quality parameter is TDS or turbidity value.
13. The control method according to claim 12, wherein the adjustment according to the raw water quality parameter is adjusted by the following method;
when TDS < Xppm, the first operation mode includes controlling the second solenoid valve (422) to open for b1 seconds and then to close, and the second operation mode includes controlling the first solenoid valve (412) to open for c1 seconds and then to close;
when Xppm is less than or equal to TDS and less than Yppm, the first operation mode comprises the step of controlling the second electromagnetic valve (422) to be opened for b2 seconds and then closed, and the second operation mode comprises the step of controlling the first electromagnetic valve (412) to be opened for c2 seconds and then closed;
when TDS is more than or equal to Yppm, the first operation mode comprises the step of controlling the second electromagnetic valve (422) to be opened for b3 seconds and then closed, and the second operation mode comprises the step of controlling the first electromagnetic valve (412) to be opened for c3 seconds and then closed;
wherein X is more than 0 and less than Y, b1 is more than 0 and less than b2 and less than b3, c3 is more than 0 and less than c2 and less than c1.
CN201611061546.3A 2016-11-24 2016-11-24 Water purification system and control method thereof Active CN106396160B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611061546.3A CN106396160B (en) 2016-11-24 2016-11-24 Water purification system and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611061546.3A CN106396160B (en) 2016-11-24 2016-11-24 Water purification system and control method thereof

Publications (2)

Publication Number Publication Date
CN106396160A CN106396160A (en) 2017-02-15
CN106396160B true CN106396160B (en) 2023-06-20

Family

ID=58082011

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611061546.3A Active CN106396160B (en) 2016-11-24 2016-11-24 Water purification system and control method thereof

Country Status (1)

Country Link
CN (1) CN106396160B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107935222A (en) * 2017-12-22 2018-04-20 珠海格力电器股份有限公司 Water cleaning systems and its control method
CN108083477A (en) * 2017-12-22 2018-05-29 珠海格力电器股份有限公司 Concentrated water discharge device and water cleaning systems comprising it, control method
CN108059265A (en) * 2017-12-22 2018-05-22 珠海格力电器股份有限公司 Water cleaning systems and its control method
CN108211798A (en) * 2018-03-16 2018-06-29 宁夏北斗星物联科技有限公司 A kind of reverse osmosis purified water process control method and system
CN110404414A (en) * 2018-04-27 2019-11-05 青岛经济技术开发区海尔热水器有限公司 A kind of water purifier control method and water purifier
CN108751485A (en) * 2018-07-27 2018-11-06 珠海格力电器股份有限公司 A kind of water treatment system and purifying drinking appliance
CN109019925A (en) * 2018-08-24 2018-12-18 珠海格力电器股份有限公司 A kind of water purification system and its control method, water purifier
CN109824158A (en) * 2019-03-08 2019-05-31 宁波福特恩净水设备有限公司 A kind of self-cleaning reverse osmosis membrane and water dispenser
CN110713230B (en) * 2019-10-22 2020-10-09 珠海格力电器股份有限公司 Water purifier recovery rate control method, device and system and water purifier
CN110713228A (en) * 2019-10-22 2020-01-21 珠海格力电器股份有限公司 Water purifier recovery rate control method, device and system and water purifier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205382021U (en) * 2015-12-15 2016-07-13 佛山尚之水净水科技有限公司 Festival water circulating system and domestic purifier of domestic purifier
CN206512007U (en) * 2016-11-24 2017-09-22 珠海格力电器股份有限公司 Water cleaning systems

Also Published As

Publication number Publication date
CN106396160A (en) 2017-02-15

Similar Documents

Publication Publication Date Title
CN106396160B (en) Water purification system and control method thereof
WO2018036753A1 (en) Reverse osmosis water purifier
JP2012206073A (en) Deionized water production system
CN108975543B (en) Water purification system and water purifier
CN108726638A (en) The control method of water treatment system, purifying drinking appliance and water treatment system
RU2671323C1 (en) Fluid cleaning system
JP2003533345A (en) Method and apparatus for purifying water
KR101372615B1 (en) A direct-type purifying device
CN110980993B (en) Water purifier and automatic flushing device and flushing method thereof
JP2001187323A (en) Membrane separation device and operation method thereof
CN214360551U (en) Water purifier
CN211521854U (en) Water purifying device
CN213294798U (en) Reverse osmosis water purification system and water purification unit
JP2019510633A (en) Method and apparatus for controlling water hardness in a house
JP2023522550A (en) How to minimize scaling in water filtration systems
CN210117291U (en) Large flux water purifier
CN211632830U (en) Water mixing system and water purifier comprising same
CN108083467A (en) Purifier
CN210163221U (en) Ecological environment-friendly wastewater-free water purifier
CN110759546A (en) Water purifying device and preparation method thereof
CN208632165U (en) Water treatment system and purifying drinking appliance
CN108975542B (en) Water purification system and water purifier
WO2021062935A1 (en) Water purifier
JP6411623B1 (en) Water sampling equipment
CN206512007U (en) Water cleaning systems

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant